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Finding the Fourth Proportional to 389,964.60, 584,946.90 and 353,806.20

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Solution

The fourth proportional to 389,964.60, 584,946.90 and 353,806.20 is: 530,709.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,964.60 : 584,946.90 = 353,806.20 : x
  2. Step 2: Convert to fraction form
    389,964.60/584,946.90 = 353,806.20/x
  3. Step 3: Cross multiply
    389,964.60x = 584,946.90 × 353,806.20
  4. Step 4: Simplify right side
    389,964.60x = 206,957,839,890.78
  5. Step 5: Solve for x
    x = 206,957,839,890.78/389,964.60
  6. Step 6: Final answer
    x = 530,709.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.